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b=418494; use SOURCE instead of OVER when source has no transparency; r=stuart

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This commit is contained in:
vladimir@pobox.com 2008-02-23 16:59:49 -08:00
parent 9d04e8e53d
commit 5997381ace
1 changed files with 17 additions and 0 deletions
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17
gfx/src/thebes/nsThebesImage.cpp
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@ -436,10 +436,15 @@ nsThebesImage::Draw(nsIRenderingContext &aContext,
return NS_OK;
// otherwise
gfxContext::GraphicsOperator op = ctx->CurrentOperator();
if (op == gfxContext::OPERATOR_OVER && mSinglePixelColor.a == 1.0)
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
ctx->SetColor(mSinglePixelColor);
ctx->NewPath();
ctx->Rectangle(aDestRect, PR_TRUE);
ctx->Fill();
ctx->SetOperator(op);
return NS_OK;
}
@ -553,11 +558,18 @@ nsThebesImage::Draw(nsIRenderingContext &aContext,
#endif
}
gfxContext::GraphicsOperator op = ctx->CurrentOperator();
if (op == gfxContext::OPERATOR_OVER && mFormat == gfxASurface::ImageFormatRGB24)
ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
ctx->NewPath();
ctx->SetPattern(pat);
ctx->Rectangle(destRect);
ctx->Fill();
ctx->SetOperator(op);
ctx->SetColor(gfxRGBA(0,0,0,0));
return NS_OK;
}
@ -650,10 +662,15 @@ nsThebesImage::ThebesDrawTile(gfxContext *thebesContext,
thebesContext->SetPattern(&pat);
}
gfxContext::GraphicsOperator op = thebesContext->CurrentOperator();
if (op == gfxContext::OPERATOR_OVER && mFormat == gfxASurface::ImageFormatRGB24)
thebesContext->SetOperator(gfxContext::OPERATOR_SOURCE);
thebesContext->NewPath();
thebesContext->Rectangle(targetRect, doSnap);
thebesContext->Fill();
thebesContext->SetOperator(op);
thebesContext->SetColor(gfxRGBA(0,0,0,0));
return NS_OK;